Two scholars at the renowned Brookings Institution, Loren Adler and Paul Ginsburg, have published an analysis finding that “average premiums in the individual market actually dropped significantly upon implementation of the ACA [Affordable Care Act].” This contrasts with a plethora of evidence, including a rigorous 2014 Brookings study, showing the ACA significantly increased premiums. In this post, I discuss methodological concerns with the Adler and Ginsburg approach as well as evidence that leads most scholars to reach a very different conclusion.